Senator Bill Nelson blames rising gas prices on Wall Street speculation. But he also called out one of President Obama’s top regulators for not reining it in.

Monday in Tampa, Senator Nelson said the President should replace Gary Gensler for not enforcing trading rules. Gensler is Chairman of the Commodity Futures Trading Commission, and previously served as a partner at Goldman Sachs

“(Gensler) has not used his legal authority to enact regulation on stopping this excessive speculation,” said Nelson, “I have asked him (President Obama) to not reappoint him.”